# 线程优先级队列（ Queue）
import queue
import threading
import time

exitFlag = 0


class MyThread(threading.Thread):

    def __init__(self, threadId, name, q):
        threading.Thread.__init__(self)
        self.threadId = threadId
        self.name = name
        self.q = q

    def run(self):
        print('开启线程：' + self.name)
        process_data(self.name, self.q)
        print('退出线程：' + self.name)


def process_data(threadName, q):
    while not exitFlag:
        queueLock.acquire()
        if not workQueue.empty():
            data = q.get()
            queueLock.release()
            print("%s processing %s" % (threadName, data))
        else:
            queueLock.release()
        time.sleep(1)


threadList = ["Thread-1", "Thread-2", "Thread-3"]
nameList = ["One", "Two", "Three", "Four", "Five"]
queueLock = threading.Lock()
# 先入先出
# workQueue = queue.Queue(10)
# 后入先出
# workQueue = queue.LifoQueue(10)
# 优先级-默认按照字母顺序
workQueue = queue.PriorityQueue(10)
threads = []
threadID = 1

# 创建新线程
for tName in threadList:
    thread = MyThread(threadID, tName, workQueue)
    thread.start()
    threads.append(thread)
    threadID += 1

# 填充队列
queueLock.acquire()
for word in nameList:
    workQueue.put(word)
queueLock.release()

print('队列大小：' + str(workQueue.qsize()))

# 等待清空队列
while not workQueue.empty():
    pass

# 通知线程是时候退出
exitFlag = 1

# 等待所有线程完成
for t in threads:
    t.join()

print('退出线程')
